8. Centripetal Forces & Gravitation

Why do we always see the same side of the $Moon$ from $Earth$?

The luminosity of a quasar is generated in a region approximately the size of which of the following?

How does your $mass$ on the $Moon$ compare to your $mass$ on $Earth$?

According to Newton's law of universal gravitation, what happens to the magnitude of the gravitational force between two objects as the distance between them increases?

Why does Mercury have so little gas in its atmosphere compared to other planets?

The yearly cycle of seasons on $\mathrm{Earth}$ is caused by what motion of $\mathrm{Earth}$?

If the Earth rotated more slowly than it currently does, which of the following would most likely occur?

In the context of gravitational forces in two dimensions, what happens if you try to move two atoms very close to each other?

Why do most coastal locations experience two high tides each day, approximately $12$ hours apart?

The measure of gravity on Earth determines our $\mathrm{\_\_\_\_\_\_\_\_\_\_}$.

Given that the mass of Venus is 81.5% that of Earth and its radius is 94.9% that of Earth, which of the following best represents the ratio of the acceleration due to gravity at the surface of Venus to that at the surface of Earth ($\frac{g_{\text{Venus}}}{g_{\text{Earth}}}$)?

Which of the following best describes a neap tide and the relative positions of the $Sun$, $Moon$, and $Earth$ that cause it?

In the context of gravitational forces in two dimensions, which force always pulls objects downward toward the surface of the Earth?

$$At which of the following locations would an object's weight be the greatest?$$

In the context of gravitational forces in two dimensions, what happens to the magnitude of the gravitational force between two point masses as mass increases?